CSF 02-07 Subaru Impreza WRX/STI All-Aluminum Radiator – w/ filler neck

With over five decades of expertise in radiator manufacturing, CSF stands as a trusted leader in delivering high-quality cooling solutions. The CSF 02-07 Subaru Impreza WRX/STI All-Aluminum Radiator with filler neck exemplifies this legacy, engineered to provide superior cooling performance essential for both street driving and competitive motorsports. This radiator is meticulously designed to meet the rigorous demands of high horsepower applications and race environments where enhanced thermal management is critical to maintaining engine reliability and performance. At the core of this radiator is CSF’s exclusive B-Tube Technology, a significant advancement over traditional oval “O” shaped tubes. These innovative “B-shaped” tubes are precision-formed and seam-brazed, allowing the use of thinner, lighter aluminum that offers improved cooling efficiency without compromising structural integrity. The unique design increases the heat transfer surface area by approximately 15% compared to conventional tubes, effectively delivering the cooling capacity of two smaller tubes within the same spatial constraints. This results in a dual liquid laminar flow, optimizing coolant movement and heat dissipation throughout the radiator. Complementing the B-Tube design, the radiator incorporates ultra-efficient multi-louvered fins with a 6.5mm fin height. These fins are precisely aligned and engineered to maximize airflow through the core, enhancing heat rejection capabilities. Each fin specification is rigorously calculated and validated through wind-tunnel testing to ensure maximum thermal efficiency under varying operational conditions. The CSF WRX/STI radiator is engineered as a true “Drop-in fit” component, requiring no modifications for installation. This ensures seamless integration with OEM components, including quick-connect hoses, AC condenser, mounting brackets, and fan shroud. The inlet and outlet connections are CNC machined to match original equipment specifications, enabling the reuse of factory or aftermarket hoses without adaptation. Additionally, the radiator features CNC machined brackets and fittings, providing exceptional durability and precise fitment that meets stringent automotive standards. Further enhancing its race-ready design, the radiator includes an all-aluminum race-style drain plug and undergoes a meticulous 1-hour “mirror finish” hand polish, reflecting CSF’s commitment to quality and attention to detail. This combination of advanced materials and manufacturing processes ensures a robust, reliable cooling system capable of withstanding the demands of both daily driving and competitive racing. Features 2-Row 42mm Core (Dual Core) Featuring CSF’s Exclusive B-Tube Technology Core Features an Ultra-Efficient Fin with 6.5mm Fin Height and Multi-Louvered Design for Maximum Surface Area Contact CNC Machined “Quick-Connect” Inlet/Outlet Connections CNC Machined Brackets and Fittings for Superb Fit and Durability All-Aluminum Race Style Drain Plug 1-Hour “Mirror Finish” Hand Polish “Drop-in Fit” Requiring No Modifications to Install – Accepts All Attaching OEM Components Including “Quick Connect” Hoses, AC Condenser, Mounting Brackets and Fan Shroud Applications Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2004-2006 Subaru – Baja – 2.5L H4 (Manual) – 2002-2005 Subaru GD/GG Impreza WRX Turbocharged 2L H4 (Manual) – 2006-2007 Subaru GD/GG Impreza WRX Turbocharged 2.5L H4 (Manual) – 2004-2007 Subaru GD/GG Impreza WRX STI Turbocharged 2.5L H4 (Manual) – OEM Part Numbers Subaru: 45111FE000 Subaru: 45119FE000 Warranty Cooling Systems and Flexibles, Inc. (CSF) guarantees the performance and reliability of its High-Performance Cooling Systems under normal use and service conditions. This warranty is extended to the original purchaser of the vehicle in which the product was initially installed. For comprehensive warranty details and conditions, please refer to our Warranty Page. SKU# 3076 Warranty Term: 2 years